Low-pressure gas burner



Patentes. Nea is, ieee. j

v WALTER ivi.V SHAW, .or Momma, KANSAS.-

isaiasi rowranssnan GAS'BURNER. n

Application filed December This invention relates'to burnersfor heaters, such as stoves and furnaces, and has for its object to produce a simple, eicient, and economicalburner, which'can be easily and quickly applied in position without necessitating any modification or change in thel an opening for engagement with a gasfeed heater. l Y

More speciiically my object is to produce j a burner composed of units whereby varying capacity of heat generation may be secured to accommodate particularfheaters, andby which a flame body of maximumv depth in 'proportion to t-he volume of gas used, is attained. A still further object is tol provide an `autematic valve vfor eecting anincrease or decrease in the Volumel of air entering the mixing chamber of the burner in proportion to -the pressure of gas supplied to such chamber. f K '-1 'lllitlrthe objects namedin view, the invention consists in certain'noveland useful features otconstruction and organization of parts as hereinafter described and claimed; and in order that it may be fully understood, reference is to be had to the accompanying drawing, in which Figure `1 is a perspective View of one of the burner units embodying the invention.

Figure 2 is an enlarged top plan View of the burner as shown in Figure 1, the flame spreader of the right-hand burner being omitted. Figure 3 is a section on the line III-III of Figure 2.

Figure 4 is a section' on the line IV-IV l of Figure 3. j

In the said drawing, where like reference charactersv identify corresponding lparts Ain all of the figures, 1 indicates a tubular casing closed at one of its ends as at'2 and beingy formed at its opposite open end Awith ank outwardly projecting peripheral flange 3. Slipped within the casing 1 is a second casing et of smaller diameter and open at its opposite ends and held in centeredV relation with respect to the first-named casing by means of a series of spacing lugs 5 to form a mixing chamber 6. It will be noted that the casing 4 is in contact with the closed end 2 of the outside casing 1, and that at said contacting end the inside kcasingis cutaway as at 7 to provide a passageway whereby the mixed air and gas in said casing 4e may escape downwardly into the mixing chamber 6 as will hereinafter appear.

The external end of the inside casing 4: is

v, 19'25, sei-mim. 73,722.'v

formed with a circumferential flange Swhichf is Vbolted lor 'otherwise tightly 'clamped against the flange 3 ofthe exterior casing'iny order to make an air-tight joint at this point. Thev exterior end of the casing l-is'iormed with abridge or web member 9 formed with pipe 10equipped at its end' and just within the inside 'casing' 4L as '-shownin Figure 3, withl a jet cap 11 of the Bunsen type.

t-"will be 'apparent that when gas escapes'.-

from the jet 11 it will rush rearwardly within? the inside casing 4 andvwill draw air into said casing from the open externalend thereerfand lin order to provide' automatic regu# lating means for said air, acircular plate 12 formed with a- 7slot 13. as shownclearly in Figure 4l, is freely hinged and supported on a pinvlfl carried by the internal casing 4.y lIVhen gas under` pressure enters the casing, theconsequent suction lcreated will suck'in great quantities of air and electthe swing-j ing of saidautomatic valve 12. Themixed air 'and gaswill passthroughthe opening' or cutaway portiony 7 in the internal casing 4 and will enter the mixing chamber 6 between the two casings where a thorough and elticient mixture will be effected. j Y

The burner-memberswhich are adapted Vto be bolted down on the outside casing ot; the mixing chamber each comprise arectangular box memberA` 16 tapering outwardly= from bottom to top and formed in the botrtom with a central Vgas entry opening v17.

The top of the outer casing 1 is formed with Y a plurality of similar spaced openings 18 each formed with side iianges 19. The opening in the bottom of eachburner Abox 16 is I centered with one of the openings 18 inthe l at their corners with supporting and spacing lugs 22 which are adapted to rest onA sup-V porting lugs 23 formed in thecorners of the boxes. When the spreaders are in position a gas escape slot or passage 24 is formed around the entireedge of the box as shown most clearly in Figure 2, and in this connec tion it will be 'listed' reference j burner boxes, to deflect the combustible mix-- tureto both ends of the burner boxes, n v

When a ,unit has been assembled as desired andas illust-rated in Figure S, it will be -apparent that the combustible mixture burning along the edges of the burnerswill beV proVH jee-ted outwardly and upwardly in 'alldirect-ions. Ags the edges of adjacent burner boxes aref spaced slightly -a-parft, the heat of combustion will'eifect an upward'current of `ai--r as show-n by the arrows land this upward current will k'not only provide Ya suiiicient quantity of air 'at thesepoints for full conlbustion but will also materially assist in pre Venting the cross flames from impeding each other and will resultin long flames impinging on the walls of the furnace or the like.

From the above description, it will be apparent that I have produced a device of the character described which possesses all of the features of advantage set forth as desirdescribed claimed i thenpreferred embodiment of the same, I re- Y serve-the right tomake all changes properly 'falling within the spirit and scope of the appended claims.

I claimt Vla. ln a gas. burner, the combination of a mixing chamber, a series of rectangular' burner boxes formedwith outwardly andupwardly inclinedwalls at all of their sides and having their upper adjacent edges spaced slightly apart to form air conduits, and an outwardly and upwardly inclined spreaderewi'thin each of said boxes and spaced therefrom, the upper edges of said spreaders being in a plane above the upper edges. of the boxes. e

' 2, In a gas burner, the vcombination of a vnixiing chamber, a series `ofrectangular burner boxes formed with outwardly and upwardly inclined walls at all of their sides and lhaving their lupper adjacent edges spaced slightly apartV to form air conduits and ,extending beyond the mixing chamber at their ends, andan outwardlyVandfupwardly inclined spreader'within eachV of said boxes and spaced therefrom, the' `upper edges of said spreaders .being inl a plane above theupper edgesof the boxes.

In witness whereofl hereunto` aiiix my i signature. y i i c WALTER M. SHAW, 

